User Manual

CHAPTER 8: ERROR CODES
COBALT HF RFID CONTROLLERS OPERATOR’S MANUAL
P/N: 17-1320 REV 01 (03-06) PAGE 104 OF 116
8.3 CBX P ROTOCOL:
E
RROR R ESPONSE P ACKET S TRUCTURE
A one-byte Error Code will be returned in the MSB of the seventh data word in the error
response packet (followed by a zero - 0x00 in the LSB).
PARAMETER FIELD MSB LSB
Overall Length
: 2-byte value indicating
the number of “words” in the Response
Packet. This value will always be at least
7 words (6 + 1 for the error code).
0x00 0x07
Error Flag Byte
: 0xFF in the MSB
indicates that an error occurred.
Command ID Echo
: 1-byte value in the
LSB indicates the command that was
attempted when the error occurred.
0xFF Command ID
Echo
Instance Counter
: This 1-byte value
tallies the number of responses from a
given Node ID.
Node ID
: 1-byte value in LSB indicates
the Node ID of the controller that
experienced or generated the error.
(Cobalt -IND = 01)
Instance Counter 0x01
Month
and
Day
timestamp
Month Day
Hour
and
Minute
timestamp
Hour Minute
Seconds
timestamp in MSB
# of Additional Bytes Retrieved
in LSB
(0x01 for error responses).
Seconds 0x01
Error Code
: 1-byte Error Code in MSB
00
in LSB
Error Code 0x00
Table 8-3: CBx Error Response Structure